Mechanical movement.



A. J. R. HEGO. MECHANICAL MOVEMENT. APPLICATION FILED APR-b1913- 1,157,933, w Patented 0ct. 26,'l9l5.

Witnesses:

- Inventor: Ifflexander J.R.Fiego, @4- ig WW His fittorneg ALEXANDER. J. n. FIEGQ, OFLY'NN, ivi'assaoiiusn'r'rs, nssreiion r GENE macro cor/many, A conrona'rron'ornnwvonm MECHANICAL MOVEMEWT.

Specification of Letters latent.

Patented Uct. 26,- Jl'tiia,

Application filed April 1, Serial N 0. 758 119.

To all whom it may concern:

Be it known that I, ALEXANDER J. R. FIEGO, a citizen of the United States, residing at Lynn, in the county of Essex, State ofllliassachusetts, have invented certain new and useful Improvements in -Meclianical' a eimple and substantially frictionless me-1.

chani cal movement for transmitting the movement of one member to another member.

More particularly the object of my invention is 'to' provide such a mechanical movement for transmitting the, movement of a member arranged to turn through the arc of a circle to a second memberalso'arranged to 'turn. through the arc of a circle wherethe paths of movement of themembers are in planes at substantially right angles to each other. *The novel features which Ibelieve to be patentablycharacteristic of my invention will be definitely indicated in the claims ap- I pended hereto.-

--tion with The details-of construction and mode of operation of a preferred embodimentof my invention will be understood by reference to the following description taken in connecthe' accompanying drawings 'in which :v I

Figure '1. is a perspective View of myinvention embodied in an electrical measuring instrument of the curve drawing type; Fig. 2 is an enlarged perspective view of the details of construction of my novel mechanical movement; and Fig. 3 is a perspective view of a modified construction embodying my in vention. p

I have illustrated my invention embodied in an electricalmeasuring instrument of the curve drawing type. My invention,,while particularly adapted for use in such an instrument, is in no senselimited thereto, and T do-Iiot, therefore, desire to belimited to the particular application of the'invention shown and described herein.

The instrument shown in the drawings comprises two fixed coils 5.a'nd 6. A frame 7 carries two movable-coils 8 and'9 inductively and operatively related to the coils .5 and {6 respectively; The frameisri-gidly secured to a pivotei shaft 10 having a-co'ntr'ol spring 11' of the usual type.-v A movable member 12 is also'rig'idly' secured to the shaft l0.

The eflect of the currents flowing in the coils is to produce a repelling action between the inductively related coils, and accordingly,

the coils 8 and 9 will move away from the ment the member 12 is turned with the shaft 10 in the arc of a circle; I

A U-shaped element 13 is rigidly secured to the outer end of the member 12. The ele-..

inent 13 is preferably constructed of resilis coils 5 and 6 respectively. By this move--.

em; or spring-like material. I have employed the phrase U-shaped element throughout the specification and claims of this application to indicate a hollow bowed element without regard to the. depth or specific configuration .of the element. The element may convent iently assumea cugved or bowed'shape, as illustrated in the rafwings, but, obviously- .I do not desire to limit my invention to this partlcular construction, and I have accord ingly employed the phrase U-shaped to cover generically all equivalent configurations.

Each end of the spring element 13 is pro vided with a slot 14:. A cord 15, preferably of silk having a knot 16 ateach end is tautly stretched across the ends of the spring element 13 with the knotslo engaging in the slots l t. The length of the cord 15 betwe'n the knots is such that the cord isheld under tension due to the resilient character of the element 13.

A link 17 is arranged for substantially reciprocatory. movement and has secured to eac end aspring element 13 of identically the sanie construction and characteristics as the spring'element secured to the end of the movable member 12. The ends of Lthe"spring element on the link 17 are flexibly connected bya cord, as previously described. The cord secured to the spring element at one end of the link 17'is tied at substantially its middle portion to the cord secured to the spring element on the movable member 12. These cords are prefcrably secured together by a knot- I'S, as will be clearly seen by reference to Fig. 2 of the drawings. The knot is preferably located at substantially the middle portion of each cord, and the spring elements are soarranged that the cords lie in substantially the same plane and form substantially right angles witheach other.i The cord 15 secured ltothe spring member at the other end of the link 17 is op- Q eratively connected to a movable member 19. The member 19 is rigidly secured. to a pivoted-shaft 20. An' indicating member 21 is operatively' secured tothe shaft 20 and" is arranged to sweep across'a time actuated chart 22 ,The indicatingmember 21 isp'rovided. with a 'pen 23 for imparting a suitable record on the chart 22:

When-current flows through the coils'of. themeasuring instrument, the shaft 10' turns about itspivotsand the movable mem- '-be'r. l2 turns through the arc of acir'cle;

The movement of the member 12' is trans-v 1 mitted to the link !l7 through the flexible connection formed by I the cooperating spring, elements and cords. The link 17 is thus given a substantially reciprocatory movement. By means of the connection beg -tvveen the link'l? and the member 19', this reciprocatory' movementof the link produces turning movement of. the shaft 20 in -"ite pivotaand the 'indicatin member 21 is; A -'thereby oved intth e are 0 a circle across" .35 the chart 2; The position of the pen point 23} on the chart will give an indication of i the strength of current to be measured. I'prefer to-secure'the cooperating cords together by means of a knot, but it will be isoapparentthat other connections may be (employed. For example, a small disk 2a having equally spaced apertures, may be 1 used for'securing togetherfour cords conmeeting the four ends ofthe spring ele- "85 ments, as illustrated in Fig. 3 of the drawings. It will'be seen that in either construction a flemble connection is provided having four cords positi'oned'in substantially the; same plane and substantially 90 40 degrees apart. v I

' It will thus be evident that I'have pro duced a very-simple device for'producing 1 acorresponding movement of two members 'whosepaths' of movement are in planes subgles to each other. The.

46 stantially at right-an connectionwhioh I have providedbetween the movable members is flexible and permits a certain irregularity in the movement of the interconnecting mechanism. The con- ;50. nection. is, furthermore, substantially fric- -'-tionless and for this reason is. particularly adapted for use in 'delicate instruments where ments workingonalternating current. 'At' certain low frequencies an objectionable vi- 6O bration is often produced in such instru ments. The mechanical movement which I haveprovided acts as'a flexible diaphragm and thus performs the functions of a shock absorber. In this manner adifliculty is at eliminated which has W been Very lamest ment. I,--therefore, aim in the appended claims to cover all modifications within the spirit of my invention which will be obvious to those skilled in the art.

What I claim as new and desire tosecure by Letters Patent of thc- UnitedStates is 2- l.' A mechanical movement comprising two movable members, an element having two arms 'resiliently' spaced with respect to each other secured to each member, means flexibly connecting the two arms of each ole ment, andfmeans whereby said last 'men tioned means'are operatively connected to.- gether. r y

2. A mechanical movement comprising 'two movable members, an element having two arms resiliently spaced with respect to each other, a cord tautly stretched between the two arms of each element, and' means securing said cords together at substantially their middle-portions.

3. "A 'mechanical movement. comprising two movable IHQIHbQIS OIlG of which has a path-of movement in the arc of a circle, an element having two arms -iesilicntly spaced -.\vitli,rcspect to each other secured to one of said members, a cord tautly stretchedlbetween the two arms of said element, and

means whereby the other movable member is oper tively connected .to substantially the mid le portion of said c'ord.

4, A mechanical movement comprising two movable members, a U-shaped. spring element secured to each member, means tiexibly connectingthe ends of. each spring ele- -ment, and means whereby said last mentioned means are operatively connected together.

5. A mechan cal movement comprising two movable members, a U-shaped spring element secured toeach member, a cord flexibly connecting theends of each element, and means operatively connecting said cords to each other.

6-. A mechanical movement comprising two movable members, a U-shaped spring' element secured to chmember, a cord tautly stretched betw en the ends of each element, and means securing said cords together at substantiallytheirmiddle porti0ns.-' v

7 A mechanical movement comprising two movable members, a U -shapcd spring element having a slot .in each end secured to each member, a cord knottedat its ends-and tautly stretched between the ends of each element the knots of 'the cord engaging in the slots of the element, and means for soouring said. cords together at substantially their middle portions.

memes 8. A mechanical movement comprising 'tWo movable members, a Ll-shaped spring element secured tov each member, a flexible connection having four cords positioned in substantially-the same plane and substantially 90 degrees apart, and means for operatively securing the four cords to the four ends ofthe spring elements.

9. A mechanicah movement comprising tWo movable members, a U-shaped spring element secured-"t0 each member, 1 a "cord tautly stretched between the ends of eachelement, said elements, being so arranged that said cords are positioned in substantially the same plane and bisect each, other atsubstantially right angles, and means se curing said cords together at 'their point of intersecti n.

10. A mechanical movement comprising two movable members, a U-shaped spring element having a slot in. each end secured to each member, a cord knotted at its ends and taut-1y stretched between the ends of each element the knots of the cord engaging in the slots of. the element, said elements being so arranged that said cords are posi tioned in substantially the same plane and bisect eacli other at substantially right an gles, and anvknot securing said cords together at their point of intersection.

11. A mechanical movement comprising a rigid member arranged to turn through the arc of a circle, a second rigid member also arranged to turn through the arc of a circle, the planes of the paths of movement of said members being substantially at right angles to each other, and a link having a U-sha-ped spring element secured to each end and a cord flexibly connecting the "ends of [each spring 'element,'-one cord being operatively secured to the firstmentioned member and;

the other cord being operatively secured to the second lmember. I v 12. A. mechanical movement comprising a rigid member arrangedto turn through the arc of a circle, a U-shaped spring element secured to said member, a cord tautly I stretched across the ends of said element, a second rigid member also arranged to turn through the'arc of a circle, the planes of the paths 'of'mo'vement of said members being substantially atrig'ht angles to each other,

and a link having a U-shaped springelement secured to each end and a cord stretched tauth 'aCross theends of each "U- shaped spring element, the cord on said first i 

